The gorgeous Hunger Games: Mockingjay actress got into promo mode early by attending the Catching Fire premiere and after party in London on Monday, with Captain America pal Laura Haddock (above, left).

And she was seksi as ever in a sequined floor length gown!

The dress featured lace sleeves and a revealing sheer panel right at Natalie’s cleavage, giving onlookers a titillating view of side boob. Hawt!!

A dramatic smokey eye and effortless golden hair completed her look. Can't wait to see her Mockingjay character brought to life!